Toddler doc martens- sizing???

[SenoraSurf]

My 1 year old son is currently a uk4. He's got some Doc marten boots but they're also a 4 and I'm wondering if I should size up before he wears them.
I'm absolutely rubbish at feeling his feet in the shoes to determine the quality of the fit. Anybody got some for their little ones and can advise? We don't have any shoe shops locally to go into and ask.

Thanks

[dementedpixie]

Is he walking? They look very bulky and clumpy for a small child.

[SenoraSurf]

@dementedpixie yes he is. They're much softer than I originally thought they would be (based on adult ones) and much easier to get on than I thought they'd be too :D